/// <summary>
/// 构造函数，初始化引擎，开Session
/// </summary>
/// <param name="config">初始化引擎的参数</param>
/// <param name="sessionParameters">开session的参数</param>
public IsrClient(IsrConfig config, string recog_grammar, string recog_params)
{
this.recog_grammar = recog_grammar;
this.recog_params = recog_params;
IsrInterop.Init(config);
}
/// <summary>
/// 结束会话。
/// </summary>
public string Finish()
{
StringBuilder lastResult = new StringBuilder();
int loop_count = 0;
//获取余下的识别结果
EndPointStatusEnums ep_status = EndPointStatusEnums.ISR_EP_NULL;
RecogStatusEnums rec_status = RecogStatusEnums.ISR_REC_NULL;
///最后一块数据发完之后，循环从服务器端获取结果
IsrInterop.AudioWrite(this.sessionId, IntPtr.Zero, 0, AudioStatus.ISR_AUDIO_SAMPLE_LAST, out ep_status, out rec_status);
///考虑到网络环境不好的情况下，需要对循环次数作限定
while (this.rslt_status != RecogStatusEnums.ISR_REC_STATUS_SPEECH_COMPLETE && loop_count++ < 30)
{
string str = null;
try
{
str = IsrInterop.GetResult(sessionId, out rslt_status, waitTime);
}
catch (EngineNoDataException)
{
break;
}
if (!string.IsNullOrEmpty(str))
{
this.result.Append(str);
lastResult.Append(str);
}
System.Threading.Thread.Sleep(200);
}
return(lastResult.ToString());
}
/// <summary>
/// 添加音频文件。
/// </summary>
/// <param name="buffer"></param>
/// <param name="offset"></param>
/// <param name="length"></param>
/// <param name="audio_status"></param>
/// <param name="ep_status">端点检测（End-point detected）器所处的状态</param>
public string AppendAudio(byte[] buffer, int offset, int length, AudioStatus audio_status, out EndPointStatusEnums ep_status)
{
if (length > BLOCK_LEN)
{
throw new ArgumentException("length超过了最大发送长度。", "length");
}
//返回部分结果
string partResult = null;
RecogStatusEnums rec_status;//识别器所处的状态
Marshal.Copy(buffer, 0, ptrBuffer, length);
///开始向服务器发送音频数据
IsrInterop.AudioWrite(sessionId, ptrBuffer, (uint)length, audio_status, out ep_status, out rec_status);
///服务器返回部分结果
if (rec_status == RecogStatusEnums.ISR_REC_STATUS_SUCCESS)
{//已经有结果缓存在MSC中了，可以获取了
partResult = IsrInterop.GetResult(sessionId, out this.rslt_status, waitTime);
if (!string.IsNullOrEmpty(partResult))
{
this.result.Append(partResult);
}
}
return(partResult);
}
public void Dispose()
{
//结束会话，释放资源
int ret = IsrInterop.QISRSessionEnd(sessionId, string.Empty);
if (ptrBuffer != IntPtr.Zero)
{
Marshal.FreeHGlobal(ptrBuffer);
}
}
public void Dispose()
{
IsrInterop.End();
}
public void Open()
{
//开始一路会话，使用会话模式，使用引擎内置的语法进行识别
this.sessionId = IsrInterop.SessionBegin(this.recog_grammar, this.recog_params);
}
public string UploadData(string keywords)
{
return(IsrInterop.UploadData(this.sessionId, keywords));
}